I changed the accessory belt and tensioner on my 04VR in March. Before the change, the battery meter on my Orange TPMS would routinely live in the 14's while the car was running and between 12 and 12.4 (or so) when off.
Since the belt change, while running the meter lives around 13.1-13.7 or so, I never see 14's anymore. The 'off' voltage is the same as before and I did change my battery in April.
The parts I bought from FCP:
30731808OE Volvo Alternator Drive Belt - Genuine Volvo 30731808OE (1) @ $49.43 = $49.43
31251250OE Volvo Accessory Drive Belt Tensioner - Genuine Volvo 31251250OE (1) @ $78.95 = $78.95
Could I have done something wrong to result in the lower running voltage? Was my old running voltage higher because I was on an old battery? Since the change I have no sqeeks or codes.